Why 30a (120v) at Home?

BFL13 wrote:
Curious what the extra 15a is for.

We only ever need 15a at home where we park the rig and leave it on shore power all the time. 15a does battery charging and any fridge time on 120v. What else is there to run at home?

Must be some reason to do 30a, because people set up for that, but I can't figure out why. Maybe I am missing a trick?

Thanks

If for no other reason, the 30 amp plug is a much more reliable connection than a standard wall plug. 15a, 30a, 50a is all 120V, just a matter of wiring and the cost difference between running a new 15a line or a new 30a line is minimal.